<HTML>

<HEAD>
	<link href="style.css" rel="stylesheet" type="text/css">
</HEAD>
<?php
	/*
		Place code to connect to your DB here.
	*/
	$userName = "root";
	$password = "group05";
	$database = "test";
	$server = "cg3002-05-z.comp.nus.edu.sg";

	$conn = mysql_connect($host, $db_username, $db_password) 
		or die ('Error Cannot Connect to MySQL');
	@mysql_select_db($database) or die( "Unable to select database");
	
	$tbl_name="inventory";		//your table name
	
	if(isset($_FILES['datatxtfile']))
	{
		$allowedExts = array("txt", "csv");
		$extension = end(explode(".", $_FILES["datatxtfile"]["name"]));
		if(in_array($extension, $allowedExts))
		{
			if ($_FILES["datatxtfile"]["error"] > 0) echo "Error: " . $_FILES["datatxtfile"]["error"];
			else uploadTxtData($_FILES["datatxtfile"]["tmp_name"]);
		}
		else echo "Invalid File";
	}
	else{
	}	

	// How many adjacent pages should be shown on each side?
	$adjacents = 3;

	/* 
	   First get total number of rows in data table. 
	   If you have a WHERE clause in your query, make sure you mirror it here.
	*/
	$query = "SELECT COUNT(*) as num FROM $tbl_name;";

	$total_pages = mysql_fetch_array(mysql_query($query));
	
	$total_pages = $total_pages[num];
	
	/* Setup vars for query. */
	$targetpage = "inventory.php"; 				//your file name  (the name of this file)
	$limit = 22; 								//how many items to show per page
	$page = $_GET['page'];
	if ($page) $start = ($page - 1) * $limit; 			//first item to display on this page
	else $start = 0;								//if no page var is given, set start to 0
	
	/* Get data. */
	$sql = "SELECT * FROM $tbl_name LIMIT $start, $limit";
	$result = mysql_query($sql);

	/* Setup page vars for display. */
	if ($page == 0) $page = 1;					//if no page var is given, default to 1.
	$prev = $page - 1;							//previous page is page - 1
	$next = $page + 1;							//next page is page + 1
	$lastpage = ceil($total_pages/$limit);		//lastpage is = total pages / items per page, rounded up.
	$lpm1 = $lastpage - 1;						//last page minus 1
	
	/* 
		Now we apply our rules and draw the pagination object. 
		We're actually saving the code to a variable in case we want to draw it more than once.
	*/

	$pagination = "";
	if($lastpage > 1){	
		$pagination .= "<div class=\"pagination\">";
		//previous button
		if ($page > 1) $pagination.= "<a href=\"$targetpage?page=$prev\"><< previous</a>";
		else $pagination.= "<span class=\"disabled\">\<< previous</span>";	
		
		//pages	
		if ($lastpage < 7 + ($adjacents * 2))	//not enough pages to bother breaking it up
		{	
			for ($counter = 1; $counter <= $lastpage; $counter++)
			{
				if ($counter == $page) $pagination.= "<span class=\"current\">$counter</span>";
				else $pagination.= "<a href=\"$targetpage?page=$counter\">$counter</a>";					
			}
		}
		elseif($lastpage > 5 + ($adjacents * 2))	//enough pages to hide some
		{
			//close to beginning; only hide later pages
			if($page < 1 + ($adjacents * 2))		
			{
				for ($counter = 1; $counter < 4 + ($adjacents * 2); $counter++)
				{
					if ($counter == $page)
						$pagination.= "<span class=\"current\">$counter</span>";
					else
						$pagination.= "<a href=\"$targetpage?page=$counter\">$counter</a>";					
				}
				$pagination.= "...";
				$pagination.= "<a href=\"$targetpage?page=$lpm1\">$lpm1</a>";
				$pagination.= "<a href=\"$targetpage?page=$lastpage\">$lastpage</a>";		
			}
			//in middle; hide some front and some back
			elseif($lastpage - ($adjacents * 2) > $page && $page > ($adjacents * 2))
			{
				$pagination.= "<a href=\"$targetpage?page=1\">1</a>";
				$pagination.= "<a href=\"$targetpage?page=2\">2</a>";
				$pagination.= "...";
				for ($counter = $page - $adjacents; $counter <= $page + $adjacents; $counter++)
				{
					if ($counter == $page)
						$pagination.= "<span class=\"current\">$counter</span>";
					else
						$pagination.= "<a href=\"$targetpage?page=$counter\">$counter</a>";					
				}
				$pagination.= "...";
				$pagination.= "<a href=\"$targetpage?page=$lpm1\">$lpm1</a>";
				$pagination.= "<a href=\"$targetpage?page=$lastpage\">$lastpage</a>";		
			}
			//close to end; only hide early pages
			else
			{
				$pagination.= "<a href=\"$targetpage?page=1\">1</a>";
				$pagination.= "<a href=\"$targetpage?page=2\">2</a>";
				$pagination.= "...";
				for ($counter = $lastpage - (2 + ($adjacents * 2)); $counter <= $lastpage; $counter++)
				{
					if ($counter == $page)
						$pagination.= "<span class=\"current\">$counter</span>";
					else
						$pagination.= "<a href=\"$targetpage?page=$counter\">$counter</a>";					
				}
			}
		}
		
		//next button
		if ($page < $counter - 1) $pagination.= "<a href=\"$targetpage?page=$next\">next >></a>";
		else $pagination.= "<span class=\"disabled\">next >></span>";
		$pagination.= "</div>\n";		
	}
function uploadTxtData($filename){	
	$tbl_name="inventory";
	$file = fopen( $filename, "r" ) or die ('ERROR: fopen()');
	
	$filesize = filesize( $filename );
	$filetext = fread( $file, $filesize );
	
	fclose( $file );
	$content = explode("\n", $filetext);
	foreach($content as $line)
	{
		list($name, $category, $manuf, $barcode, $costprice, 
		$currentStock, $minStock, $bundleunit) = explode(":",$line);
		$name = db_escape_string($name);

		$query = "INSERT INTO $tbl_name VALUES('".$barcode."', '".$name."', '".$costprice."', '".$category."', 
											'".$manuf."', '".$currentStock."', '".$minStock."', '".$bundleunit."');";
		$result = mysql_query($query) or die(mysql_error());
	}	
}
function println($string_message = '') {
	return isset($_SERVER['SERVER_PROTOCOL']) ? print "$string_message<br />" . PHP_EOL:
		print $string_message . PHP_EOL;
}
function db_escape_string($text) {
	if (function_exists('mb_detect_encoding')) {
		$cur_encoding = mb_detect_encoding($text);
		if(($cur_encoding != "UTF-8" && $cur_encoding != "ASCII") || !mb_check_encoding($text, "UTF-8")) 
			$text = utf8_encode($text);
	}
	return mysql_escape_string($text);
}

?>

<?php
	echo '<table class="table table-condensed table-hover table-bordered">';
	echo "<thead><th>Product Name</th><th>Category</th><th>Manufacturer</th><th>
			Barcode</th><th>Cost Price</th><th>Current Stock</th><th>
			Minimum Stock</th><th>Bundle Unit</th></tr></thead><tbody>";
	while($row = mysql_fetch_array($result)){
		echo "<td>".$row['product_name']."</td>";
		echo "<td>".$row['category']."</td>";
		echo "<td>".$row['manufacturer']."</td>";
		echo "<td>".$row['barcode']."</td>";
		echo "<td>".$row['cost_price']."</td>";
		echo "<td>".$row['current_stock']."</td>";
		echo "<td>".$row['min_stock']."</td>";
		echo "<td>".$row['bun_unit']."</td>";
		echo "</tr>";
	}
	echo "</table>";
?>

<?php
	echo $pagination
?>
